//Note:recur.c--递归演示
//Author:乾哥
//Date:2022-04-17
#include <stdio.h>
void up_and_down(int);

int main(void)
{
    up_and_down(1);
    return 0;
}

void up_and_down(int n)
{
    printf("Level %d: n location %p\n",n,&n);//#1
    if (n<4)
        up_and_down(n+1);
    printf("LEVEL %d: n location %p\n",n,&n);//#2
}
